Which of the following is NOT correct when high-voltage leads are eliminated in potential transformer (PT) bushings?

Option 2 is NOT correct because eliminating high-voltage leads from PT bushings generally reduces complexity and potential points of failure, not increases them. So saying it increases short-circuit risk is incorrect.

Function of bushings in PT

• When a high-voltage conductor passes through a metal sheet or frame at earth potential, the necessary insulation is provided in the form of a bushing.
• The bushing's primary function is to prevent electrical breakdown between the enclosed conductor and the surrounding earthed metal work.
• The high voltage conductor passes through the bushing made of some insulating material (e.g., porcelain, steatite).
• In transformers, bushings are insulating devices that allow electrical conductors (such as transformer leads) to pass safely through the transformer tank or casing while preventing the high voltage from leaking to the grounded parts of the transformer.
• Their primary purpose is insulation, ensuring that the high-voltage leads are protected from the tank and the surrounding environment.
• Bushings provide a safe way to bring electrical connections out of the transformer without shorting the circuit or causing electrical faults.
• They are designed to handle high voltages and currents, while also preventing any potential dielectric breakdown between the conductor and the transformer tank.